Commit e3f79f3b authored by Alex Williamson's avatar Alex Williamson
Browse files

vfio/pci: Add virtual capabilities quirk infrastructure 



If the hypervisor needs to add purely virtual capabilties, give us a
hook through quirks to do that.  Note that we determine the maximum
size for a capability based on the physical device, if we insert a
virtual capability, that can change.  Therefore if maximum size is
smaller after added virt capabilities, use that.

Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 5b31c822

hw/vfio/pci-quirks.c

+4 −0
Original line number Diff line number Diff line
@@ -1850,3 +1850,7 @@ void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev) 
        break;

    }

}

int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp)

{

    return 0;

}

hw/vfio/pci.c

+8 −0
Original line number Diff line number Diff line
@@ -1833,7 +1833,15 @@ static int vfio_add_std_cap(VFIOPCIDevice *vdev, uint8_t pos, Error **errp) 
        pdev->config[PCI_CAPABILITY_LIST] = 0;

        vdev->emulated_config_bits[PCI_CAPABILITY_LIST] = 0xff;

        vdev->emulated_config_bits[PCI_STATUS] |= PCI_STATUS_CAP_LIST;



        ret = vfio_add_virt_caps(vdev, errp);

        if (ret) {

            return ret;

        }

    }



    /* Scale down size, esp in case virt caps were added above */

    size = MIN(size, vfio_std_cap_max_size(pdev, pos));



    /* Use emulated next pointer to allow dropping caps */

    pci_set_byte(vdev->emulated_config_bits + pos + PCI_CAP_LIST_NEXT, 0xff);

hw/vfio/pci.h

+1 −0
Original line number Diff line number Diff line
@@ -160,6 +160,7 @@ void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr); 
void vfio_bar_quirk_exit(VFIOPCIDevice *vdev, int nr);

void vfio_bar_quirk_finalize(VFIOPCIDevice *vdev, int nr);

void vfio_setup_resetfn_quirk(VFIOPCIDevice *vdev);

int vfio_add_virt_caps(VFIOPCIDevice *vdev, Error **errp);



int vfio_populate_vga(VFIOPCIDevice *vdev, Error **errp);